Olefin polymerization or copolymerization catalyst components

Abstract

Adducts of a trialkylaluminum or a dialkylaluminum hydride and diisoalkenyl benzene compounds have been discovered. Catalyst components for the polymerization of olefins have also been developed which comprise, as the cocatalyst, the reaction product of a trialkylaluminum or a dialkylaluminum hydride (e.g., diisobutylaluminum hydride) and an alkenyl-substituted benzene (e.g., diisopropenyl benzene).

We claim: 
     
       1. A Ziegler-Natta catalyst composition for the polymerization of olefins which comprises a supported catalyst component and, as a cocatalyst, the reaction product of a dialkylaluminum hydride and an alkenyl-substituted benzene compound. 
     
     
       2. A Ziegler-Natta catalyst composition for the polymerization of olefins which comprises a supported catalyst component and, as a cocatalyst, the reaction product of a trialkylaluminum or a dialkylaluminum hydride and a diisoalkenyl benzene compound. 
     
     
       3. The catalyst composition of claim 2 wherein the hydride contains two C 2  -C 8  alkyl groups. 
     
     
       4. The catalyst composition of claim 2 wherein the hydride is diisobutylaluminum hydride. 
     
     
       5. The catalyst composition of claim 2 wherein the diisoalkenyl benzene is diisopropenyl benzene. 
     
     
       6. The catalyst composition of claim 4 wherein the diisoalkenyl benzene is diisopropenyl benzene.